The Vibe: Your crypto isn’t one big pile of money—it’s a bunch of separate “bills” or coins from past transactions that you haven’t spent yet, like loose change in your pocket.
The Details: UTXO stands for Unspent Transaction Output. In blockchains like Bitcoin, Litecoin, and others using the UTXO model, your wallet doesn’t track a single running balance like a bank account. Instead, the network records every transaction as inputs (spending old UTXOs) and outputs (creating new UTXOs). A UTXO is a specific amount of crypto received from a previous transaction that hasn’t been spent yet—it’s “unspent.” When you send crypto, you use one or more whole UTXOs as inputs, and the transaction creates new UTXOs: one for the recipient and usually “change” back to yourself. This prevents double-spending because each UTXO can only be spent once. Your total balance is just the sum of all your UTXOs. This model offers better privacy (harder to link transactions to one identity) and helps with scalability compared to account-based models (like Ethereum), where there’s a single balance per address that gets updated.
Pro Tip: When fees are high, try to consolidate small UTXOs into fewer larger ones during low-fee periods (use “coin control” in advanced wallets if available) to avoid paying extra fees later—spending many tiny UTXOs makes transactions bigger and more expensive. For privacy, avoid reusing addresses so new UTXOs go to fresh addresses.